wrote in message
ups.com...
Actually, maybe it doesn't have gain compared to a halo... I'm not
really sure... I have an inconclusive 6m Big Wheel EZNEC model with an
average gain problem... though at this point it's only showing a -0.5dB
average gain or so, and impedance and gain seem constant with
segmentation changes, so it's probably not so bad.

I made it back when I was considering building one and modified it a
little bit to make the avg. gain work out better.

Anyway, if anyone wants to try to get it to work reliably, there's a
model at

http://www.n3ox.net/projects/eznec/6mBigWheel.ez

Dan

Hi Dan

I made a model of two Turnstiles (crossed 1/2 wave dipoles) stacked, one
above the other. EZNEC shows 2.9 dBi gain at the horizon with free space
conditions. The individual dipoles have input impedance of about 68 -J
10.
It seems that two turnstiles, stacked vertically might be a decent choice
for a omniazimuth horizontally polarized 2 meter antenna.

Jerry